Used primarily as a photoinitiator in UV-curable systems such as inks, coatings, and adhesives. It efficiently generates free radicals upon exposure to ultraviolet light, promoting rapid polymerization of acrylate-based resins. Commonly applied in printing inks and electronic coatings where low yellowing and high reactivity are required. Also utilized in some fine chemical syntheses as an intermediate due to its methoxy-substituted aromatic structure.